Possible to not make light blend colors?
Ok, so this is going to be pretty extensive and difficult to explain through text and images but I'll do my best.

Make sure you're in cycles render 

Begin by deleting everything in your scene, add in your text and center it


Now lets create our layers, name layer 1 and layer 2 (name choice is up to you). Make the first layer associated with layer 1 and the second layer with layer 2


Add a camera into your scene, press 5 and then 7 to enter top down orthographic view, and then Ctrl+Alt+0 to move the camera to your current perspective 

(you can then modify how close the camera is to the text with g and then z, or using the axis arrows).

Move to the second layer and create 3 planes (one will be the red light, white light and colour of the text) Make sure that these three planes are spaced out along the z-axis to ensure that they aren't intersecting. From here, enter edit mode and manipulate the vertices to match the shape you're trying to create for the lights. 

You should have something that looks like this:


Select one of the planes that is representing a light, select the object settings and under Cycles Settings deselect diffuse. Do this for both planes representing lights.

Go into the node editor, select one of the planes representing a light and create this node setup:


Once you have done this for both light planes, create a similar node setup for the plane that will represent the text's colour. Should look like this:


(The emission colour will effect the text's colour)

Tick the transparent option, shift select both layers and hit render.


After rendering go into the compositor and create this setup:


This is pretty much the final result, now all you need to do is animate the colour ramps to emulate the lights, crank the white value closer to the black and that will remove your issue of the colours blending.



Hope this helps and resolved your issue, sorry if any of this is hard to understand. If so, just let me know and I'll do my best to reiterate what I was trying to say. I will also attach the .blend file so that you can dissect what I did if you get stuck.